antibiotics and barbiturates are the more common causative drugs; however, any drug can cause this rash

purpuric eruptions

purple areas on the skin, often on the legs

some anticoagulants and diuretics

Stevens-Johnson syndrome

blisters or a hive-like rash on the lining of the mouth, vagina, or penis

antibiotics that contain sulfa, barbiturates, penicillins, and certain drugs used for high blood pressure and diabetes

How are drug rashes diagnosed?

Diagnosing a rash caused by a reaction to medication is complicated. Even a small amount of a drug can cause a major reaction in the skin. In addition, the reaction can occur after the patient has taken a medication for a long time. Your physician will usually advise you to stop taking any medication that is not necessary to sustain your life, to see if the reaction abates. Other medications may be substituted, if possible.

Treatment for drug rashes:

The condition usually clears up if the patient stops taking the medication that is causing the reaction. Other treatment may include: